Line SDK Voice Agent Guide

Build production voice agents with the Cartesia Line SDK. This guide covers agent creation, tool patterns, multi-agent workflows, and LLM provider configuration.

How Line Works

Line is Cartesia's voice agent deployment platform. You write Python agent code using the Line SDK, deploy it to Cartesia's managed cloud via the cartesia CLI, and Cartesia hosts it with auto-scaling. Cartesia handles STT (Ink), TTS (Sonic), telephony, and audio orchestration. Only one deployment per agent is active at a time; once deployed, your agent receives calls automatically.